Not really sure - I got it only a year or two ago from B&B Cactus in Tucson...it was on a $1 clearance rack, so I just couldn't pass it up! It started out almost completely prostrate, but just in the last month, it perked up, went vertical, then started to bloom.

So beautiful! Indeed it is by far the best time of the year!!Is that Frailea free planted in your yard? It's amazing that it have open flowers.I only obtain open flower with a special treatment. Very hot, very bright sunlight and a constant moisture.

Only when the last tree has died, the last river has been poisoned and the last fish has been caught will we realize that we cannot eat money.(Wisdom of the Cree Indians)

also an FYI cholla blooms are edible, I have never heard of saguaro blooms being too.Many of the local populations relied on the saguaro for food and I dont remember the flower buds being edible, but they sure ate the cholla buds

A reliable Echinocereus stramineus decided this week was the week to bloom.

Echinocereus stramineus (Chandler, AZ)

Echinocereus stramineus (2012-May06).JPG (95.32 KiB) Viewed 853 times

My first flower of Gymnocalycium ragonesii also bloomed this week (tough getting a good pic of this one as it's in filtered shade).

Gymnocalycium ragonesii (Chandler, AZ)

Gymnocalycium ragonesii (2012-May06).JPG (61.35 KiB) Viewed 853 times

And finally, my old Echinopsis that remained unidentified with certainty for over 10 years as it has refused flowering all that time FINALLY treated me with a single flower this year, confirming my suspected ID of Echinopsis huascha.